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This patch adds sysfs support to xHCI usb2 hardware LPM, so developer can enable and disable usb2 hardware LPM manually for test purpose. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>